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US 7,479,000 B2Granted
Gear pump
AssigneeM&M Technologies, Inc.
InventorJames B. Klassen
Life of this patent
Estimating the term…
Abstract
A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the driven rotor mesh to form a positive displacement seal. The teeth of the driving rotor and the driven rotor are configured such that seals between the inlet side and the discharge side of the pump are formed between only the leading surfaces of the teeth of the driving rotor and the trailing surfaces of the teeth of the driven rotor.
Claims25
A pump comprising:
- a casing;
- a driving rotor that is supported for rotation within the casing, the driving rotor having a plurality of teeth, each of the plurality of teeth having a leading convex surface and a trailing surface;
- and
- a plurality of driven rotors coupled to said driving rotor and supported for rotation within the casing, each of said plurality of driven rotors having an inlet port and a discharge port and a plurality of teeth, each of the plurality of teeth having a leading surface and a trailing flat surface;
- wherein the driving rotor and the plurality of driven rotors are positioned in the casing such that, as the driving rotor and the plurality of driven rotors rotate, the plurality of teeth of the driving rotor and the respective pluralities of teeth of the driven rotors are interfaced with one another to form a seal between the inlet port and the discharge port of each driven rotor, the seal being formed only between the leading convex surfaces of the teeth of the driving rotor and the trailing flat surfaces of the teeth of the driven rotors.
2 more elements
A pump comprising:
- a casing;
- a driving rotor supported for rotation within the casing, said driving rotor having a plurality of teeth, each of the plurality of teeth having a leading surface and a trailing surface;
- and
- a plurality of driven rotors supported for rotation within said casing, said plurality of driven rotors surrounding said driving rotor such that said driving rotor is centrally located with respect to said driven rotors and said driving rotor has a diameter which is larger than the diameter of each of said driven rotors, and
- each of said plurality of driven rotors having an inlet port and a discharge port and a plurality of teeth, each of the plurality of teeth having a leading surface and a trailing surface,
- wherein said driving rotor and said plurality of driven rotors are positioned in said casing such that, as the driving rotor and the plurality of driven rotors rotate, the plurality of teeth of the driving rotor and the respective pluralities of teeth of the driven rotors are interfaced with one another to form first and second seals, said first seal being formed only between the leading surface of one of said plurality of teeth of said driving rotor and the trailing surface of one of said plurality of teeth of one of said plurality of driven rotors, and said second seal being formed only between the leading surface of an adjacent one of said plurality of teeth of said driving rotor and the trailing surface of an adjacent one of said plurality of teeth of said one driven rotor, such that a continuous sealed fluid chamber extends from said first seal to said second seal and between said inlet and discharge ports of said one driven rotor.
3 more elements
Dependencies are inferred from the claim text.